Before her performance of "Escape my mind" Grace tasted caviar for the first time (and obviously did not take to it), She also recorded a parody of Oasis' "Wonderwaal" (and of herself) with Melissa on guitar.
(This was not shown with the show, but published on YouTube on July 30. It should strictly speaking be a performance of its own, but we have bundled it with the "main"-performance).
”Grace Vanderwaal wants you to know who she is. She also knows that her last name sounds like Oasis' 'Wonderwall' but it's not until now that she's taken advantage of it. Grace just recently stopped by the Late Late Show with James Corden for a performance but also decided to parody everyone (or no one)'s favorite karaoke song. Her version of 'Wonderwall' or 'Vanderwaal' is hilarious between commenting on her America's Got Talent days and being compared to Taylor Swift. (1035kissfm.iheart.com)
“In the parody, VanderWaal poked fun at her YouTube fame and America’s Got Talent run, with references to her yellow pants (“I can’t believe that anybody/ Would wear those banana pants”) and first prize earnings (“I can’t believe that anybody/ Would give a million to a child/ Then bought a treehouse”). VanderWaal also poked fun at her Corden appearance, sporting a grin as she belted, “Well maybe, this show will be the one that saves me/ Cause after all, I’m Grace VanderWaal.” (Rolling Stone July 31, 2018)